2014-2020 for Yamaha YZ 450 F BOYESEN Impeller/Waterpump Cover Magnesium WPK-38C Multi-Tread helps deliver the best

Multi-Tread helps deliver the best of both worlds: class-leading mileage

Constructed of titanium throughout the head pipe

the HC1 gives you a noticeable improvement in motorcycle performance

Abrasion resistant aramid reinforcement thread

Solid frame mounting using existing attachment points

2014-2020 for Yamaha YZ 450 F BOYESEN Impeller/Waterpump Cover Magnesium WPK-38C Multi-Tread helps deliver the bestManufacturer: Boyesen MPN: WPK 38CM Title: Hy Flow Water Pump Cover And Impeller Kit Color: Magnesium Cast aluminum construction. Increased coolant flow in all RPM ranges. Patented nautilus style impeller for hydrodynamic efficiency.